/*
 * Copyright (c) 2010 Hajime Tazaki
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Authors: Hajime Tazaki <tazaki@sfc.wide.ad.jp>
 */

//-----------------------------------------------------------------------------
// Unit tests
//-----------------------------------------------------------------------------

#include "ns3/abort.h"
#include "ns3/arp-l3-protocol.h"
#include "ns3/attribute.h"
#include "ns3/icmpv4-l4-protocol.h"
#include "ns3/inet-socket-address.h"
#include "ns3/internet-stack-helper.h"
#include "ns3/ipv4-address.h"
#include "ns3/ipv4-interface.h"
#include "ns3/ipv4-l3-protocol.h"
#include "ns3/ipv4-list-routing.h"
#include "ns3/ipv4-packet-info-tag.h"
#include "ns3/ipv4-raw-socket-factory.h"
#include "ns3/ipv4-static-routing.h"
#include "ns3/log.h"
#include "ns3/node.h"
#include "ns3/object-factory.h"
#include "ns3/simple-net-device-helper.h"
#include "ns3/simple-net-device.h"
#include "ns3/simulator.h"
#include "ns3/socket-factory.h"
#include "ns3/tcp-l4-protocol.h"
#include "ns3/test.h"
#include "ns3/traffic-control-layer.h"
#include "ns3/udp-l4-protocol.h"
#include "ns3/udp-socket-factory.h"
#include "ns3/udp-socket.h"

#include <string>

using namespace ns3;

/**
 * \ingroup internet-test
 *
 * \brief IPv4 PacketInfoTag Test
 */
class Ipv4PacketInfoTagTest : public TestCase
{
  public:
    Ipv4PacketInfoTagTest();

  private:
    void DoRun() override;

    /**
     * \brief Receive callback.
     * \param socket Receiving socket.
     */
    void RxCb(Ptr<Socket> socket);
    /**
     * \brief Send data.
     * \param socket Sending socket.
     * \param to Destination address.
     */
    void DoSendData(Ptr<Socket> socket, std::string to);
};

Ipv4PacketInfoTagTest::Ipv4PacketInfoTagTest()
    : TestCase("Ipv4PacketInfoTagTest")
{
}

void
Ipv4PacketInfoTagTest::RxCb(Ptr<Socket> socket)
{
    uint32_t availableData;
    Ptr<Packet> m_receivedPacket;

    availableData = socket->GetRxAvailable();
    m_receivedPacket = socket->Recv(std::numeric_limits<uint32_t>::max(), 0);
    NS_TEST_ASSERT_MSG_EQ(availableData, m_receivedPacket->GetSize(), "Did not read expected data");

    Ipv4PacketInfoTag tag;
    bool found;
    found = m_receivedPacket->RemovePacketTag(tag);
    NS_TEST_ASSERT_MSG_EQ(found, true, "Could not find tag");
}

void
Ipv4PacketInfoTagTest::DoSendData(Ptr<Socket> socket, std::string to)
{
    Address realTo = InetSocketAddress(Ipv4Address(to.c_str()), 200);
    if (DynamicCast<UdpSocket>(socket))
    {
        NS_TEST_EXPECT_MSG_EQ(socket->SendTo(Create<Packet>(123), 0, realTo), 123, "100");
    }
    // Should only Ipv4RawSock
    else
    {
        socket->SendTo(Create<Packet>(123), 0, realTo);
    }
}

void
Ipv4PacketInfoTagTest::DoRun()
{
    Ptr<Node> node0 = CreateObject<Node>();
    Ptr<Node> node1 = CreateObject<Node>();

    SimpleNetDeviceHelper simpleNetDevHelper;
    NetDeviceContainer devs = simpleNetDevHelper.Install(NodeContainer(node0, node1));
    Ptr<SimpleNetDevice> device = DynamicCast<SimpleNetDevice>(devs.Get(0));
    Ptr<SimpleNetDevice> device2 = DynamicCast<SimpleNetDevice>(devs.Get(1));

    InternetStackHelper internet;
    internet.SetIpv6StackInstall(false);

    // For Node 0
    node0->AddDevice(device);
    internet.Install(node0);
    Ptr<Ipv4> ipv4 = node0->GetObject<Ipv4>();

    uint32_t index = ipv4->AddInterface(device);
    Ipv4InterfaceAddress ifaceAddr1 = Ipv4InterfaceAddress("10.1.1.1", "255.255.255.0");
    ipv4->AddAddress(index, ifaceAddr1);
    ipv4->SetMetric(index, 1);
    ipv4->SetUp(index);

    // For Node 1
    node1->AddDevice(device2);
    internet.Install(node1);
    ipv4 = node1->GetObject<Ipv4>();

    index = ipv4->AddInterface(device2);
    Ipv4InterfaceAddress ifaceAddr2 = Ipv4InterfaceAddress("10.1.1.2", "255.255.255.0");
    ipv4->AddAddress(index, ifaceAddr2);
    ipv4->SetMetric(index, 1);
    ipv4->SetUp(index);

    // IPv4 test
    Ptr<SocketFactory> factory = node0->GetObject<SocketFactory>(UdpSocketFactory::GetTypeId());
    Ptr<Socket> socket = factory->CreateSocket();
    InetSocketAddress local = InetSocketAddress(Ipv4Address::GetAny(), 200);
    socket->Bind(local);
    socket->SetRecvPktInfo(true);
    socket->SetRecvCallback(MakeCallback(&Ipv4PacketInfoTagTest::RxCb, this));

    // receive on loopback
    Simulator::ScheduleWithContext(socket->GetNode()->GetId(),
                                   Seconds(0),
                                   &Ipv4PacketInfoTagTest::DoSendData,
                                   this,
                                   socket,
                                   "127.0.0.1");
    Simulator::Run();

    Ptr<SocketFactory> factory2 = node1->GetObject<SocketFactory>(UdpSocketFactory::GetTypeId());
    Ptr<Socket> socket2 = factory2->CreateSocket();
    Simulator::ScheduleWithContext(socket2->GetNode()->GetId(),
                                   Seconds(0),
                                   &Ipv4PacketInfoTagTest::DoSendData,
                                   this,
                                   socket,
                                   "10.1.1.1");
    Simulator::Run();

    // ipv4 w rawsocket
    factory = node0->GetObject<SocketFactory>(Ipv4RawSocketFactory::GetTypeId());
    socket = factory->CreateSocket();
    local = InetSocketAddress(Ipv4Address::GetAny(), 0);
    socket->Bind(local);
    socket->SetRecvPktInfo(true);
    socket->SetRecvCallback(MakeCallback(&Ipv4PacketInfoTagTest::RxCb, this));

    // receive on loopback
    Simulator::ScheduleWithContext(socket->GetNode()->GetId(),
                                   Seconds(0),
                                   &Ipv4PacketInfoTagTest::DoSendData,
                                   this,
                                   socket,
                                   "127.0.0.1");
    Simulator::Run();

    factory2 = node1->GetObject<SocketFactory>(Ipv4RawSocketFactory::GetTypeId());
    socket2 = factory2->CreateSocket();
    Simulator::ScheduleWithContext(socket2->GetNode()->GetId(),
                                   Seconds(0),
                                   &Ipv4PacketInfoTagTest::DoSendData,
                                   this,
                                   socket,
                                   "10.1.1.1");
    Simulator::Run();
    Simulator::Destroy();
}

/**
 * \ingroup internet-test
 *
 * \brief IPv4 PacketInfoTag TestSuite
 */
class Ipv4PacketInfoTagTestSuite : public TestSuite
{
  public:
    Ipv4PacketInfoTagTestSuite();

  private:
};

Ipv4PacketInfoTagTestSuite::Ipv4PacketInfoTagTestSuite()
    : TestSuite("ipv4-packet-info-tag", UNIT)
{
    AddTestCase(new Ipv4PacketInfoTagTest(), TestCase::QUICK);
}

static Ipv4PacketInfoTagTestSuite g_packetinfotagTests; //!< Static variable for test initialization
